<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<view class="search-box">
			<my-search @click="gotoSearch"></my-search>
		</view>
		
		
		<view class="scroll-view-container">
			<!-- 左侧滑动view -->
			<scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
				<block  v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i === active ? 'active':'']" @click="activeChanged(i)" >{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧滑动view -->
			<scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="right-scroll-view-item" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 动态渲染二级分类的列表数据 -->
					<view class="cate-lv2-title">{{item2.cat_name}}</view>
					<!-- 动态渲染三级分类的列表数据 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<image :src="item3.cat_icon" class="cate-lv3-img"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar_badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				wh:0,
				// 分类数据列表
				cateList: [],
				// 左侧点击项
				active:0,
				// 二级分类
				cateLevel2:[],
				// 滚动条距离顶部的距离
				scrollTop: 0,
				
			}
		},
		methods: {
			async getCateList(){
				const{data:res} =await uni.$http.get('/api/public/v1/categories')
				console.log(res)
				if(res.meta.status!==200) return this.$showToast(res.meta.msg)
				this.cateList = res.message
				// 为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i){
				// if (this.active===i) return
				console.log(i)
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			getCateLevelTwo(){
				this.cateLevel2 = this.cateList[i].children
			},
			gotoGoodsList(item){
				// console.log(item)
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					 url: '/subpkg/search/search'
				})
			}
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			// console.log(sysInfo)
			this.wh = sysInfo.windowHeight
			
			// 调用获取分类列表数据的方法
			this.getCateList()
		}
	}
</script>

<style lang="less" scoped>
.search-box {
	    position: sticky;
	    top: 0;
	    z-index: 999;
	}
.scroll-view-container{
	display: flex;
}

.left-scroll-view{
	width: 120px;
}

.left-scroll-view-item{
	line-height: 60px;
	background-color: aliceblue;
	font-size: 12px;
	text-align: center;
	// 激活项的样式
	&.active {
	        background-color: #ffffff;
	        position: relative;
	
	        // 渲染激活项左侧的红色指示边线
	        &::before {
	          content: ' ';
	          display: block;
	          width: 3px;
	          height: 30px;
	          background-color: #c00000;
	          position: absolute;
	          left: 0;
	          top: 50%;
	          transform: translateY(-50%);
	        }
	}
}

.right-scroll-view{
	
}

.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}

.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	
	.cate-lv3-item{
		width: 33.3%;
		display: flex;
		flex-wrap: wrap;
		flex-direction: column;
		align-items: center;
		margin-bottom: 10px;
		
		image{
			width: 60rpx;
			height: 60rpx;
		}
		
		text{
			font-size: 12px;
		}
		
	}
}

</style>
